Model 100MM 4 -Fresh Air Carbon Filter

100MM Fresh Air Carbon Filter. FRESH Filter 100mm (4`) x 250mm (175m3/hr). Effective way to remove unwanted smells for the grower on a budget. FRESH Filters use high quality virgin carbon specifically manufactured for air treatment. Under normal circumstances you can expect this filter to last upto 6 - 12 months. The fabric sleeves on this type of filter should be changed every three months to protect the life of the carbon.